\newproblem{lay:1_9_1}{
  % Problem identification
	\begin{large}
	  \hspace{\fill}\newline
    \textbf{Lay, 1.9.1}
	\end{large}
	\\
  \ifthenelse{\boolean{identifyAuthor}}{\textit{Carlos Oscar Sorzano, Aug. 31st, 2013} \\}{}

  % Problem statement
  Find the standard matrix of $T:\mathbb{R}^2\rightarrow\mathbb{R}^4$, when $T(\mathbf{e}_1)=(3,1,3,1)$ and
	$T(\mathbf{e}_2)=(-5,2,0,0)$ where $\mathbf{e}_1=(1,0)$ and $\mathbf{e}_2=(0,1)$.
}{
  % Solution
	The standard matrix of $T$ is
	\begin{center}
		$A=\begin{pmatrix}T(\mathbf{e}_1) & T(\mathbf{e}_2)\end{pmatrix}=\begin{pmatrix}3 & -5 \\ 1 & 2 \\ 3 & 0 \\ 1 & 0\end{pmatrix}$
	\end{center}
}
\useproblem{lay:1_9_1}
\ifthenelse{\boolean{eachProblemInOnePage}}{\newpage}{}
